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Chilognatha :: Chilognatha (n. pl.) One of the two principal orders of myriapods. They have numerous segments, each bearing two pairs of small, slender legs, which are attached ventrally, near together..

Mesothorax :: Mesothorax (n.) The middle segment of the thorax in insects. See Illust. of Coleoptera.

Pantoscopic :: Pantoscopic (a.) Literally, seeing everything; -- a term applied to eyeglasses or spectacles divided into two segments, the upper being designed for distant vision, the lower for vision of near objects..

Phalangoidea :: Phalangoidea (n. pl.) A division of Arachnoidea, including the daddy longlegs or harvestman (Phalangium) and many similar kinds. They have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. They breathe by tracheae. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea..

Proleg :: Proleg (n.) One of the fleshy legs found on the abdominal segments of the larvae of Lepidoptera, sawflies, and some other insects. Those of Lepidoptera have a circle of hooks. Called also proped, propleg, and falseleg..

Segmentation :: Segmentation (n.) The act or process of dividing into segments; specifically (Biol.), a self-division into segments as a result of growth; cell cleavage; cell multiplication; endogenous cell formation..

Setigerous :: Setigerous (a.) Covered with bristles; having or bearing a seta or setae; setiferous; as, setigerous glands; a setigerous segment of an annelid; specifically (Bot.), tipped with a bristle..

Procerite :: Procerite (n.) The segment next to the flagellum of the antennae of Crustacea.

Epimere :: Epimere (n.) One of the segments of the transverse axis, or the so called homonymous parts; as, for example, one of the several segments of the extremities in vertebrates, or one of the similar segments in plants, such as the segments of a segmented leaf..

Two-cleft :: Two-cleft (a.) Divided about half way from the border to the base into two segments; bifid.

Manubrium :: Manubrium (n.) A handlelike process or part; esp., the anterior segment of the sternum, or presternum, and the handlelike process of the malleus..

Manus :: Manus (n.) The distal segment of the fore limb, including the carpus and fore foot or hand..

Merosome :: Merosome (n.) One of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed..

Cone :: Cone (v. t.) To render cone-shaped; to bevel like the circular segment of a cone; as, to cone the tires of car wheels..

Nephridium :: Nephridium (n.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.

Protovertebra :: Protovertebra (n.) One of the primitive masses, or segments, into which the mesoblast of the vertebrate embryo breaks up on either side of the anterior part of the notochord; a mesoblastic, or protovertebral, somite. See Illust. of Ectoderm..

Ectolecithal :: Ectolecithal (a.) Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the center of the egg; as, ectolecithal ova..

Felly :: Felly (n.) The exterior wooden rim, or a segment of the rim, of a wheel, supported by the spokes..

Brachium :: Brachium (n.) The upper arm; the segment of the fore limb between the shoulder and the elbow.

Morula :: Morula (n.) The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See Segmentation..

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